Heel-attaching machine



April 27, 1943. 'r. sEELY 2,317,410 4 HEEL ATTAGHING MACHINE I FiledApril 2]., 1941 3 Sheets-Sheet l WI/E/V THE? April 27, 1943. T. H. SEELYHEEL ATTAC'HING MACHINE 3 Sheets-Sheet 3 Filed April 21, 1941 PatentedApr. 27, 1943 I UNITED STATES PATENT OFFICE 2,317,410

BEEL-ATTACHING MACHINE Thomas H. Seely,Me1rose, Mesa, assignor UnitedShoe Machinery Corporation, Flemington, N. 1., a corporationof NewJersey Application April 21, 1941,- Serial No. seam :5 Claims. (cue-42)This invention relates to machines for attaching heels to shoes, andespecially to those in which a shoe and heel are clamped together upon asupport, and then subjected to the action of a tool or tools foreffecting the insertion of a screw through a passage in a last withinthe shoe and through the heel-seat into the heel.

An object of the invention is to eil'ect the clamping oi the work bymeans which gives the operator free access to it, and which applies theclamping pressure eifectively and in a manner which may be varied forwork of different forms. with this in view, I combine with a support fora lasted shoe and a heel, and a tool for operating thereon, awork-clamping device, which may include a lever, movable into engagementwith the last of the work upon the support and thereupon extendingupwardly and rearwardly from said last, and a mounting joining themember to the machine-frame and situated above the support. With thisarrangement, the clamping member in its active position is entirelyremoved from the field in which the operator must manipulate the work.As herein disclosed,'to,the lever of the work-clamping mechanism arepivotally connected two arms, also pivoted to the machineframe, onebeing joined to the lever'through a link. This link and the arm joinedto it furnish a toggle, through the straightening of which the clampinglever may be actuated. The direction of approach of the. clamping memberto the work is preferably alte ed by changing the pivotal connection ofthe lin to the lever. To enable the operator by depression of a treadleto first move the clamping member quickly into engagement with the work,and, thereafter to apply a relatively heavy clamping pressure, twolevers are fulcrumed upon the treadle and are yieldably urged towardeach other, as by a connecting spring. The treadle also carries clutchmechanism, and two links join the clamping mechanism to the clutchmechanism and to one of the V levers.

link. Through the two links, the work-approaching and pressure-applyingactions of the clamping mechanismare effected. Such an actuating erateupon the work, to act only with a. predetermined force. This may be forthe purpose of preventing a heel-attaching screw from being set toohard, so the thread formed in the heel might The other lever has meansfor producing engagement of the clutch mechanism with its be stripped.Another object of my invention is .to free a tool from its driving meansby effective mechanism, accurate in its response to the chosen releasingforce. About a. driving shaft, a sleeve is' rotatable and is connectedto the tool, there also being a clutch-disk rotatable about the shaftand co-operating with a clutch member carried by said shaft. The diskand sleeve are compelled to rotate together while moving relativelylongitudinallyof the shaft, and have a spring or other means for forcingthem yieldably togethertoward each other. Movable longitudinally of theshaft is means for varying this force, as by a screw extending throughthe end of the shaft, convenient for adjustment by the operator. Thatthe resistance oflered by the clutchelements to release may be uniform,they are constantly lubricated from a receptacle which surrounds saidelements and'is rotatable with the clutch. To this receptacle,'thelubricant r: ay be supplied during rotation through an opening in asurrounding stationary casing. With the clutch-elements arranged as justindicated, the receptacle is preferably carried by the sleeve connectedto thetool. Any excess of lubricant supplied to the receptacle may becollected in a depression in the casing, and discharged through anopening therein.

Since the rotation of the shaft through which the tool is driven mayendanger the operator by contact with it, an object of the invention isto properly protect this. To thisv end, it is guarded by a surroundingsleeve formed of intermeshing oppositely placed helices. The guard isflexible,

may be made resistive to distortion, and by form ing the helices underastress tending to contract them, the weight of the parts is partiallycounterbalanced.

A further object of the invention is to so mount certain mechanisms ofthe machine, that they are situated conveniently for the particularoperator by whom they are to be used, and so they shall properlyco-operate with each other. For

, .the attainment of this object, a column is movcarrying ablevertically in the machine-frame, said frame the work-support.Work-clamping V mechanism and an operating tool are mounted togetherupon the column for co-operation with the support. The clampingmechanism and tool are thus simultaneously adjustable as to height,

' as for the purpose of locating the clamping mechanism for properengagement with the work upon the support. The work-support may bepositioned vertically upon the frame as desired bythe opera or. I haveherein shown a member carried by the frame and upon which the columnrests, together with means arranged to raise and lower the member. Whenthe column is adjusted in this manner, it is desirable that it shall notdisturb the normal position of the treadle, because of its connection tothe clamping mechanism carried by the column. One of a series ofconnecting members between the treadle and clamping mechanism is,therefore, movable upon the frame, and another upon the column or othermounting member for the cwmping mechanism. The member upon the frame isunaffected by the adjustment, and the companion member may be so relatedas to be little disturbed. I prefer to employ in the connections twolevers, one fulcrumed upon the frame and the other upon the mountingmember, and to connect these two levers by a substantially horizontallink.

In the accompanying drawings illustrating a particular'form of theinvention,

Fig. 1 shows the upper portion of my improved machine in side elevation,with parts broken away;

Fig. 2 is a similar view ofthe lower portion of the machine;

Fig. 3, a vertical section through one'of the driving clutches taken ina plane from front to rear of the machine;

Fig. 4; a front elevation of elements;

the work-clamping Fig. 5, a broken side elevation of such elements intheir normal positions; and

Figs. 6 and 7, full horizontal sections on the lines VI-VI and VII-VII,respectively, of Fig. 3.

In many respects the present apparatus remechanism IB actuated bytreadle mechanism C.

Here, it is subjected to the action of drilling mechanism D foroperating a drill at through a passage in the last to make a holethrough the heel-seat of the shoe into the heel. Thereafter, a temporaryscrew s is inserted in the hole through the last-passage by drivingmechanism E, until the head of the screw acting against the crown of thelast-cone draws the cup of the heel firmly against the heel-seat, toretain it until an interposed adhesive has set.

A frame I0 furnishes at the top a table l2,

through which passes a spindle I4, which may be clamped in differentvertical positions by a setscrew l8. A vertical bore in the upperextremity of this spindle receives a stem l8 upon the worksupport A,which "may be fixed at different heights by a set-screw 20. Both thespindle and stem areshown spotted to assure proper retention by theset-screws, those for the stem being more closely spaced. Thus, a coarseand fine adiustment of the work-support is provided, which is employedfor both varying th position at which the work is engaged by theclamping mechanism D and the level of said work for the convenience ofthe operator. The support A has'a tread-rest 22 for .the shoe and heel,the angle of'which may be altered by an adjusting wedge 24, and there isaback-stop 26 for the heel, this bein'gvariable in height.

- Through a verticalbore in an enlargement 28 at the rear of the tablepasses a tubular column 30.

Upon this-are clampedb screws 32 brackets. 34

and 36, these, respectively, carrying theclamping mechanism B and thedrilling and screw-driving path. followed by the rod 50 is indicated bythev mechanisms D and E. At the bottom, the column rests upon abase-piece 38, below which is a collar 40, supported by a nut 42threaded upon the lower extremity of a rod i4 rising through the column.The hooked upper end 46 of the rod passes through a slot in the column,and lies in a depression in the top of the enlargement 28. By turningthe nut 42, the base-piece and column may be lifted together or allowedto descend to locate the clamping mechanism and the drilling and drivingmechanisms at difl'er'ent levels. Having set the work-support A at aheight chosen by the operator, by the screws l6 and 20, adjustment ofthe column will position the clamping mechanism to properly approach andengage the last-cone to hold the work for the operations upon it. In thelatter respect the adjustment of the work-support also may be utilized,the screw 20 giving a fine adjustment.

The clamping mechanism 18 has a cross-rod E50, extending between thelower extremities of two spaced side-pieces of a lever 52 and arrangedto bear upon the crown of the cone of the last L. At their upper ends,the side-pieces are joined by a rod 54 (Fig. 4) The lever 52 has afloating fulcrum-pin 56, which pivotally connects an upper linl:v 58 toa lower arm 60 made up of spaced sidepieces pivoted at 62 upon thebracket 36. The link 58 is pivotally joined at M to an arm 66, which isin turn pivoted at 65 upon the bracket 34. A slot 1'0 in the lever 52may lee-shifted along the fulcrum-pin 56, it being located atpredetermined points by a cross-pin 12, which is engaged by any one of aseries of pairs of depressions 'M in the sides of the lever 52. In theselected depressions, the pin 12 is retained by a pair oftension-springs "l6, l6, connecting the pivot-pins 54 and 6 1. To anextension from the arm 68, near its center. a rod 18 is joined. At thethreaded lower extremity of the rod, supported upon a nut and lock-nutill].

is a compression-spring. 82. Upon the upper end of the springrests acollar 84, loose upon the rod and'engaged by a cross-pin 86 extendingthrough a slot in said rod and connecting the spaced arms 88 of abell-crank-lever 89. Another arm. 92 of the lever projects upwardly, andis joined by a link 94 to one arm of a bell-cranlr-lever $16 fulcrumedbeneath the table l2. From a second arm of the lever 96, rods or links58 and 99 lead to the treadle mechanism C.

The elements of the clamping mechanism E are initially related asappears in Fig. 5 of the draw ings. The arm 66 is prevented fromswinging r'earwardly past the vertical position by a stopscrew I00;threaded into the arm and contacting with the column 30. placed upon thesupport A, actuation of the treadle mechanism draws down the rod I8.This straightens the toggle, formed by the arm 66 and the portion ,ofthe link 58 above its pin", and lowers the lever 52, the rod 50 engagingthe crown of the last-cone. This is as shown in Fig. 1. The

upper curved dash line (Fig. 5) joining its extreme positions. This iswith the cross-pin "F2 in the lowest pair of depressions 14 in theleverl'iz.

' As the lasts and heels vary in form, the pin may After the work hasbeen giving the operator access ,to it wholly without interference.

Considering now the mechanism C through which the clamping mechanism Bis actuated, there is fulcrumed at H6 at the bottom of the frame atreadle I I2, having connecting its spaced side-arms a foot-pad II4 fordepression by the operator. The treadle is held normally raised by atension-spring I I6, connected to the underside of the table I2. It maybe latched down to hold the work under clamping pressure by a footleverII6, iulcrum'ed at I26 upon the treadle and having a detent I22 engagingsome one of a series of teeth I24, upon a segment I26 carried upon theframe. An expansion-spring I26 interposed between the treadle and thelever II6 urges the latching detent against the segment. Fulcrumed atI36 upon the treadle is a lever I32, compelled initially to move bodilywith the treadle by a spring I34, whichjoins it to said treadle and actsto draw a projection I36 from its lower end against the fulcrum I26 ofthe latching lever.

Fulcrumed at I36 with the, lever I32 is a second lever I38, which at itsouter extremity is held yieldably against the end of the lever I32 by amechanismc, associated with the treadle-rod 99.

A normally fixed block I44 of the clutch mechanism is pivotally mountedat I46 upon the treadle H2, and may be adjusted toward and from thelever-roll I42 by a contactes cre'w M8 threaded horizontally upon thetreadle. Guided upon the stationary block I44 is a movable clutch-blockH52, for engagement by the roll M2. The op posed faces of theclutch-blocks may be recessed vertically to receive between them anextension I54 pivoted at I66 upon the rod 66.

When the operator depresses the treadle M2 to bring the rod 56 of themechanism B into engagementwith the last in theshoe upon the support A,the roll I42 is so positioned that it does not exert clutching pressureupon the block H52,

. tension-spring I46 extending between them. The

Y ing ill (Fig. 3) and a lower bearing ltilis aver- I and the rod 99 isfreely movable. The treadle,

however, transmits movement through the lever till, link tihlever 96,link 94, lever 96, spring 82 and rod ill, to straighten the toggle-lever66, 58 and carry the rod .56 into engagement with the last-crown, as hasalready been described. This is accomplished speedily, incause theeffective attachment of the link 98 to the treadle mechanism is close tothe operatorfs foot. When the rod 66 rests upon the last-cone, themovement of all the elements joining it to the lever I32 stops. so theend of this lever at the link 98 is held against movement. Depression ofthe treadle continues, both the springs I34 and M6 expanding. The outerend of the lever I36 is separated from the end of the'lever I32, and thecontraclockwise movement of the lever-fulcrum vI36 (Fig. 2) causes theroll I42 and the clutch-block l52 to be forced together, urging saidblock toward the block I44 and clutching the rod-extension l54 to thetreadle. The rod 96, through the chain of elements previously traced,applies relafulcrum Ill and the extension I64, and between said fulcrumand foot-pad II4. In its clamping position, the treadle is maintained bythe detent I22, to be released when desired by-depression of thelatching lever H8. The tension of the v springs I34 and I46 may beadjusted by screws I66, I66, threaded through the lever E32 and to,

which they are connected. Yield of the spring I46 limits the force whichmay beapplied by the roll I42 to the clutch 0. Variation in theposition' of the screw I46 allows the normal relation of the clutch tothe roll to be adjusted. Since 6 the clamping force is applied to thework through the loaded spring 62, the compressibility of this spring,determined by adjustment of the nuts 66, limits said force.

It is desirable that'the normal height of the treadle II2, which may bevaried to suit the operator by a terminal I62 threaded upon the link 66,shall remain constant, to whatever height the column 36 may be adjusted."Sucha condition is attained by the actuating connections of thisinvention. The'fulcrum of the lever 66 is fixed and, therefore,unchanged by. the adjustments, while the vertical shift of the lever 66,

I fulcrumed through the collar 46 to move with the column and actingupon the substantially horizontal link 64, has little effect upon thelever 96. Therefore, any change in the height of the treadle, producedby movement of the column, is

negligible.

Taking up the operating mechanisms D and E which, respectively, drillthe work and insert a screw therein these mechanisms are supportedtogether upon the bracket 36 with a motor M6, by which they are driven.The mechanisms may be similarly mounted and operated, and only thescrew-driving mechanism E will be described in detail. This mechanism Eis carried by a casing I12, secured to the end of a stem H4 extendinghorizontally through an opening in the bracket 35 and secured adjustablyby a set-screw l'lt. Journaled in the casing in an upper heartical shaftlat, there being a sleeve ltd fitting about the bottom of the shaft,between it and the hearing lllll. The shaft is rotated by belt-gearingI86 from the motor-shaft, that of the mechanism E turning at a lessspeed than that of the mechanism D. The sleeve m4 is internally threadedat its lower extremity to receive an upper threaded portion of auniversal joint ltl'. The lower portion of the joint has fast upon itthe upper section of a. telescopic extensible shaft I83, the lowersection of which is united through a universal joint I66 (Fig. 1) to ashort shaft W2. Secured in an opening in the bottom of the casing H2about the shaft I68 and its universal joints is a guard-sleeve g, whichprevents contact of the person of the operator, or of work-parts withthe enclosed rotating elements of the machine. Attached to the lowerextremity of the guard-sleeve is a collar tilt, and separablyconnectedto this collar by a bayonet joint iflfl is a handle 266,arranged to be grasped by the operator and in which the shaft E92 turns.Uutside the handle there is secured to the shaft till a -chuck N2, ofsuch forrnas to receive and compreferably formed, as best shown in Fig.3, of intermeshing oppositely placed inner and outer helical strips ofsheet-metal 264 and 265, ll- 01' channel-shaped in cross-section. Thesestrips a about the driving pins H2.

22! rotates, the oil is thrown by centrifugal force are wound under astress which causes the helices to contract longitudinally, and,therefore, to shorten the sleeve. This tendency at least partiallycompensates for the weight of the lower section of the shaft I" and theelements which it carries, making-it easier for the operator tomanipulate the driven tool. .Supports 201' are mounted for vertical andhorizontal adjustment upon the bracket 34. By these, the tools of themechanisms D and E may be held in inactive positions convenient fortheir taking and return by the operator.

It is desirable that the force exerted by the screw-driver or other toolshall be limited. This may be provided, for example, in order that thescrew 3 shall be turned into the work with its head exerting asubstantially definite heelclamping pressure upon the last.Consequently, there is provided, between the driving shaft I82 and thedriven sleeve IN, a' clutch which will release when the proper force isexerted. Extending horizontally through a bore in the shaft above thesleeve is a cross-pin 208 (Fig. 3). Resting upon thepin is a disk 208,in the underside of which are depressions 2H1, 2 l0 separated by 180 Thedisk and sleeve are compelled to rotate together, while capable ofindependent vertical movement, by two pins 2|2 rising from the sleeveand extending into openings-in the disk. This disk is urged intoengagement with the cross-pin by a spring 2, interposed between saiddisk and a washer 2" of inverted cup-shape, upon which rest flat washers2IB. To allow a variation in the i'orce with which the spring 2 urgesthe.

disk 20. into engagement with the cross-pin 205, there is recessed intothe upper washer a crossbar 220 movable vertically in a slot in theshaft I82. Guided in an axial bore in the shaft is a rod 222,

hearing at its lower end upon the crossbar and,

having contacting with its upper extremity a screw 22! threaded axiallyinto the shaft. The screw may be turned in either direction to lowerorpermit to be raised the rod, crossbar and wash- -ers, and thus theexpansive effect of the spring this purpose, the sieeve I is extendedupwardly at no about the clutching surfaces and outside the dependingskirt of the washer 2 IE to furnish an oil-receptacle. The oil may bedelivered to this receptacle, while it is rotating, through aninlet-pipe 22! opening through the upper or cover-portion of the casingI12. Flowing from the delivery-opening, the oil is directed by anannular drip-flange 230 upon the casing and a downwardly and inwardlyinclined surface 232 at the upper side of an inwardly projecting flange23 at the top of the receptacle; Over the surface 222, it flows througha narrow annular space between the flange and the washer 2l6.- Withinthe receptacle, the oil is free to pass to the clutching surfacesthrough, clearance spaces inthc/disk 2B8 As the receptacle to theoutside in a circular body,-which narrows as it rises and isretained bythe flange 234. Any

excess 0! oil which has been supplied will escape interior of the casingH2. The falling oil is directed by a lower external annular flange 228-upon the receptacle into a depression 238 near the bottom of the casing.As it gathers in the depression, the oil may escape through a pipe 2%,leading through the bracket 36 into the column 30. Here, it may becollected in a receptacle. In'introducing oil through the pipe 228, theescape through the pipe 24!) serves as an indication of the suiliciencyof the supply. The oil, which is thereafter retained within thereceptacle 226, will properly lubricate the mechanism for a considerableperiod. With this normal charge of oil, the contracted space between theflange 234i and the washer m holds against escape the oilvapor createdby the movement of the elements within the receptacle.

-In using the apparatus, the operator, placing the cup of the heel uponthe heel-seat of a lasted shoe S, applies their tread-surfaces to therest 22 of the support A. Between the heel-seat and the heel-cup, anadhesive has been applied. De-

pressing the treadle N2 of the mechanism C, the

rod 50 of the clamping mechanism B, through the rod and intermediateconnecting elements, is brought upon the crown of the last L within theshoe. Continued actuation of the treadle separates the'lever N8 of thetreadle mechanism from the lever 532 the consequent movement of thelever-fulcrum 030 causing the clutching of the rod-extension l58 to thetreadle between the blocks I and .852. Now, relatively heavy pressure,of a degree determined by the load which has been placed upon the spring82, is applied to the work through the rod 99 and the same connectionsas for the rod 98, and the treadle is latched at I22, E24 to hold thispressure. Taking the constantly rotating drill or the mecha:

nism D from its support 20? by its handle 200, the operator passes thisdrill through the lastpassage to produce a hole in the heel-seat or theshoe and in the clamped heel. Returning the drill to its support, theoperator places a screw .9 in the last-passage, and applies to its headthe chuck 202 of the inserting mechanism E, manipulating' this similarlyto the mechanism D. When the chosen turning force upon the screw isexceeded, the cross-pin 208 in the driving shaft I82 leaves thedepressions in the disk 208 to stop the rotation of the screw-driver, itclicking in and out of these and warning the operator that the insertionis completed. The chuck is thereupon removed from the screw-head, andthe mechanism E returned to its support, the work now being unclamped bydepressing the latching lever H8. The shoe with its temporarily attachedheel is thus released by the mechanism 3 for removal from the support A.

Having described my invention, what I claim as new and desire to secureby Letters Patent 01 the United States is:

1. In a heel-attaching machine, a support for a 'lasted shoe and a heelto be attached thereto, a. tool for operating upon the work, aworkclamping device including a lever movable into engagement with thelast of the work upon the xii-support and thereupon extending upwardlyand rearwardly from said last, and a mounting for the lever situatedabove the support.

2. In a heel-attaching machine, a frame, a support for a lasted shoe anda heel to be attached thereto, said support being carried by the vframe,a tool for operating upon the work through the last, a work-clampingmember extending upwardly from said last, and a mounting for the memberjoining it to the frame and being situated above the support. 1

3. In a heel-attaching machine, a frame, a

I support for a lasted shoe and a heel to be atpivotally connected tothe lever, a second arm pivoted upon the frame,.a link pivotallyconnected to the second arm and to the lever and furnishing withsaidsecond arm a toggle-lever, and

means for straightening the toggle-lever to render the clamping levereffective. a A

4. In a heel-attaching machine, a tram a support for a lasted shoe and aheel to be attached thereto carried by the frame, .a tool movable uponthe frame for operating upon the work, a clamping lever arranged forengagement with the last, an arm pivoted upon the frame and pivotallyconnected to the-lever, a-second arm pivoted upon the frame, a linkpivotally connected to the second arm and to the lever, and meansconnected to the second arm for actuating the clamping lever.

5. In a heel-attaching machines. frame, a support for a lasted shoe anda heel to be attached thereto carried by the frame, a tool movable uponthe frame for operating upon the work, a clamping lever arranged forengagement with the last, an arm pivoted upon the frame and pivotallyconnected to the lever, a second arm pivoted upon the frame, a pivotallyconnected to the second arm and to the lever, means arranged to make thepivotal connection at different points along the lever, and meansconanism, a second lever fulcrumed upon the treadle ing member and tothe lever, a link connected/ to the 'clamping.member and arranged forengagement by the clutch mechanism, a second lever iulcrumedupon thetreadle, a spring joining the second lever to the first, and meanscarried by the second lever for producing engagement of the clutchmechanism with its link.

10. In a heel-attaching machine, a support for a lasted shoe and a heelto be attached thereto, a tool for operating upon the work, awork-clamping member movable against the last, a treadle, clutchmechanism carried by the treadle, a lever fulcrumed upon the treadle, alink connected to the clamping member and to the lever a link connectedto the clamping member and arranged for engagement by the clutchmechanism, a second lever having the same fulcrum as the first andyieldably urged toward it, and a roll rotatable upon the second leverfor actuating the clutch mechanism.

11, In a heel-attaching machine, a support for a lasted shoe and a heelto be attached thereto,

. a tool for operating upon the work, a work-clampnected to the secondarm for actuating the clamping lever.

6. In a heel-attaching machine, a frame, a support for a lasted shoe anda heel to be attached' thereto carried by the frame, a tool movable uponthe frame for operating upon the work, a clamping lever arranged forengagement with the last and provided with a slot and a series ofdepressions, an arm pivoted upon the frame and having a pivot enteringthe lever-s1ot,.

a second arm pivoted upon the frame, a link joined to the second arm andto the pivot of the first arm in the slot, a projection from the linkwhich may be placed in any one of the leverdepressions, and means foractuating the clamping lever.

"I. In a heel-attaching machine, a frame, a support for a lasted shoeand-a heel to be attached thereto carried bythe frame, a tool movableupon a projection from the link which may be placed in any one of thelever-depressions, and a spring joining the connection between thesecond arm and the link to the lever.

8. In a heel-attaching machine, a support for a lasted shoe and a heelto be attached thereto, a tool for operating upon the work, aworkclamping member movable against the, last, a treadle, clutchmechanism carried by the treadle, a lever fulcrumed upon the treadle, alink connected to the clamping member and to the lever, a link connectedto'the clamping member and arranged for engagement by the clutch mechingmember movable against the last, a treadle,

clutch mechanism carried by the treadle, lever mechanism fulcrumed uponthe treadle, a link connecting the clamping member to the levermechanism, a link connected to the clamping member and arranged forengagement by the clutch mechanism, and means arranged to vary theposition of the clutch mechanism with respect to the lever mechanism. v

12. In a heel-attaching machine, a support for a lasted shoe and a heelto be attached thereto, a tool for operating upon the work, a.work-clampmg member movable against the last, a treadle,

clutch mechanism pivoted upon the treadle, lever mechanism Iulcrumedupon the treadle, a link connecting the clamping member to the levermechanism, a link connected to the clamping member and arranged forengagement by the clutch mechanism, and a contact-screw threaded uponthe treadle and engaging the clutch mechanism to turn it upon its pivot.

.13. In a heel-attaching machine, a support for a lasted shoe and a heelto be attached thereto, a tool for operating upon the work, awork-clamping member movable against the last, a treadle, a plurality ofsuccessively eifective links through which the treadle may act withdifferent leverages upon the clamping member, and members including aloaded spring for connecting each of the links to the clamping member.

14. In a heel-attaching machine, a work-support, a rotatable toolco-operating therewith, a I

rotatable driving shaft, a sleeve rotatable about the shaft andconnected to the tool, a clutch-disk rotatable about the shaft, aco-operating clutch member carried by the shaft, means for compellingthe disk and sleeve to rotate together while moving relativelylongitudinally of the shaft, and

means for forcing the disk and co-operating clutch member yieldablytogether.

15. In a heel-attaching machine, a work-sup:

- port, a rotatable tool co-operating therewith, a

rotatable driving shaft, a sleeve rotatable about the shaft andconnected to the tool, a clutch-disk ing from the sleeve and engagingthe disk, a

spring surrounding the shaft, and means extending through the shaft forforcing the spring against the disk. I

17. In a heel-attaching machine, a work-support, a rotatable tool.co-operating therewith, a rotatable driving shaft, 9. spring surroundingthe shaft, clutch members connecting the shaft and tool for engagementunder the influence of the spring, a member extending transversely ofthe shaft and movable thereon to act upon the spring, and an adjustingmember extending'longitudinally of the shaft and engaging the'transversemember.

18. In a heel-attaching machine, a work-support, a rotatable toolco-operating therewith, a rotatable driving shaft, a spring surroundingthe shaft, clutch members connecting the shaft and tool for engagementunder the influence of thespring, a member movable upon the shaft to actupon the spring, and an adjusting screw for the member extending throughthe end of-the shaft.

19. In a heel-attaching machine, a work-support, a rotatable toolco-operating therewith, a rotatable driving shaft, a clutch throughwhich the'shaft drives the tool, said clutch releasin when the toolencounters a predetermined resistance, and a receptacle for a lubricantrotatable with the clutch.

20. In a heel-attaching machine, a work-support, a rotatable toolco-operating therewith, a

rotatable driving shaft, a clutch through which the shaft drives thetool, said clutch releasing when the tool encounters a predeterminedresistance, a'receptacle for a lubricant rotatable with the clutch, andmeans through which the lubricant may be supplied to the receptacleduring rotation.

21. In' a heel-attaching machine, a work-support, a rotatable toolco-operating therewith, a rotatable driving shaft, a sleeve rotatableabout the shaft and connected to the tool, a clutch connecting the tooland shaft, and a receptacle for a lubricant surrounding the clutch andcarried by the sleeve.

22. In a heel-attaching machine, a work-support, a rotatable toolco-operating therewith, a rotatable driving shaft, a clutch throughwhich the shaft drives the tool, said clutch releasing when the toolencounters a predetermined resistance, a receptacle for a lubricantrotatable with the clutch, and a stationary casing surrounding thereceptacle and having an opening and means for directing into thereceptacle the lubricani introduced through the opening.

23. In a heel-attaching machine,'a work-support, a rotatable toolco-operating therewith, a rotatable driving shaft, a sleeve rotatableabout extending about the clutch members.

24. In a heel-attaching machine, a work-support, a rotatable toolco-operating therewith, a rotatable driving shaft, a clutch throughwhich the shaft drives the tool, said clutch releasing when 'the toolencounters a predetermined resistance, a receptacle for a lubricantrotatable with the clutch, and astationary casing surrounding thereceptacle and having an opening and means for directing into thereceptacle the lubricant introduced through the opening, .the casingfurther being provided with a lubricantcollecting depression and anopening through which the collected lubricant may be discharged.

25. In a heel-attaching machine, a work-support, a rotatable toolco-operating therewith, a

rotatable driving shaft, a sleeve rotatable about the shaft andconnected to the tool, a clutch connecting the tool and shaft, and areceptacle for a lubricant surrounding the clutch and carried by thesleeve, said receptacle having at its open side an inwardly extendinglubricant-retaining projection.

26. In a heel-attaching machine, a work-support, a rotatable toolco-operating therewith, a rotatable driving shaft, a sleeve rotatableabout the shaft and connected to the tool, a clutch connecting the tooland shaft, a receptacle for a lubricant surrounding the clutch andcarried by the sleeve, said receptacle having at its open side aninwardly extending lubricant-retaining projection, and a memberrotatable with the shaft and lying in proximity to the projection toform therewith a narrow passage for the lubricant.

27. In a heel-attaching machine, a work-support, a rotatable toolco-operating therewith, a rotatable driving shaft for the'tool, and aguardsleeve surrounding the shaft and formed of intermeshing oppositelyplaced helices.

28. In a heel-attaching machine, a work-support, a rotatable toolco-operating therewith, a rotatable driving shaft for the tool, and aguardsleeve surrounding the shaft and formed of intermeshing oppositelyplaced helices which are under a stress tending to contract themlongitudinally.

29. In a heel-attaching machine, a frame, a work-support carriedthereby, a column vertical- 1y movable through the frame, means forsecuring the column at different heights, and wort:- clamping mechanismand an operating tool mounted upon the column for cooperation with thesupport. 7

30. In a heel-attaching machine, a frame, a work-support carriedthereby, means arranged to vary the height of the work-support upon theframe, a column vertically movable through the frame, means for securingthe column at difierent heights, and work-clamping mechanism and anoperating tool mounted upon the column for co-operation with thesupport.

31. In a heel-attaching machine, a frame, a

umn rests, and means arranged to raise and lower the member.

securing the column at difierent heights,

32. In a heel-attaching machine, a frame, a work-support carriedthereby, a column vertically movable through the frame, means forworkclamping mechanism mountedupon the column and co-operating with thesupport, a rod supported by the frame and extending through the lowerportion of the column, a member surrounding the rod and upon which thecolumn rests, and a nut threaded upon the rod and supporting the member.I

33. In a heel-attaching machine, a frame, a work-support carriedthereby, a work-clamping member co-operating with the support, amounting member variable in position vertically in the frame and uponwhich the work-clamping member is movable, a treadle, and a series ofconnecting members between the treadle and workclamping member, one ofsaid connecting members being movable upon the frame and another movablewith the mounting member.

34. In a heel-attaching machine,--a frame, a work-support carriedthereby, a. work-clamping member co-operating with the support, amountoperating with ing member variable in position vertically in theframe and upon which the work-clamping member is movable, a treadle, anda series of connecting members between the treadle and work-clampingmember, one of said connecting members consisting of a lever fulcrumedupon the frame and another of a lever fulcrumed to move with themounting member, with a substantially horizontal link connecting thelevers.

35. In a heel-attaching machine; a frame, a

work-support carried thereby, a columnivertically movable through theframe, means, for securing the column at different heights,work-clamping mechanism mounted upon the column and cothe support, amember carried by the frame and upon which the column rests, meansarranged to raise and .lower the member. a lever arranged to be raisedand lowered with the member, a lever fulcrumed upon the frame,

a link connecting the levers, means for joining the first-mentionedlever to the work-clamping member, a treadle, and means for joining thesecond lever to the treadle.

- THOMAS H. SEELY.

QER'I'IFICATE OF CORRECTION. Patent No 2,517,1u0. April 27,3 5.

THOMAS H. -SEIELY.

It is hereby certified that error appears in the printed specificationof the above numberedpatent requiring correction as follows: Page 1,first column, line 22, for "active" read --inactiVe--; and secondcolumn, line 11-12, after theword "yieldably" strike out -togethar--;page 1;, second column, line 75 ,'claim 2 ,.strike out "said'f andinsert instead "engagement with the--;-page 5, first column, line 58claim 7, for "slots" read -'-slot---; andthat the said Letters. Patentshould be read with this correction therein that the same may conform tothe record of the case in the Patent Office.

Signed and sealed this 6th day of July, A. D. 1915.

Henry Van Arsdale, (Seal) Acting Commissioner of Patents.

